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| author | Greg Kurz <gkurz@linux.vnet.ibm.com> | 2016-05-31 10:09:54 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2016-06-07 15:39:28 +0300 |
| commit | c02d7030c3c538312c7f464cb79b72c29a20df74 (patch) | |
| tree | 460b25c3f584db57a1aaf09ed00d7224e449a127 | |
| parent | 9f318f8f7e689b9653b42bac73047f9719a1f34e (diff) | |
| download | qemu-c02d7030c3c538312c7f464cb79b72c29a20df74.tar.gz | |
virtio: move bi-endian target support to a single location
Paolo's recent cpu.h cleanups broke legacy virtio for ppc64 LE guests (and
arm BE guests as well, even if I have not verified that). Especially, commit
"33c11879fd42 qemu-common: push cpu.h inclusion out of qemu-common.h" has
the side-effect of silently hiding the TARGET_IS_BIENDIAN macro from the
virtio memory accessors, and thus fully disabling support of endian changing
targets.
To be sure this cannot happen again, let's gather all the bi-endian bits
where they belong in include/hw/virtio/virtio-access.h.
The changes in hw/virtio/vhost.c are safe because vhost_needs_vring_endian()
is not called on a hot path and non bi-endian targets will return false
anyway.
While here, also rename TARGET_IS_BIENDIAN to be more precise: it is only for
legacy virtio and bi-endian guests.
Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | hw/virtio/vhost.c | 4 | ||||
| -rw-r--r-- | include/hw/virtio/virtio-access.h | 6 | ||||
| -rw-r--r-- | target-arm/cpu.h | 2 | ||||
| -rw-r--r-- | target-ppc/cpu.h | 2 |
4 files changed, 5 insertions, 9 deletions
diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index 4400718154..81cc5b0ae3 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -767,15 +767,11 @@ static inline bool vhost_needs_vring_endian(VirtIODevice *vdev) if (virtio_vdev_has_feature(vdev, VIRTIO_F_VERSION_1)) { return false; } -#ifdef TARGET_IS_BIENDIAN #ifdef HOST_WORDS_BIGENDIAN return vdev->device_endian == VIRTIO_DEVICE_ENDIAN_LITTLE; #else return vdev->device_endian == VIRTIO_DEVICE_ENDIAN_BIG; #endif -#else - return false; -#endif } static int vhost_virtqueue_set_vring_endian_legacy(struct vhost_dev *dev, diff --git a/include/hw/virtio/virtio-access.h b/include/hw/virtio/virtio-access.h index 8dc84f5203..4b28038146 100644 --- a/include/hw/virtio/virtio-access.h +++ b/include/hw/virtio/virtio-access.h @@ -17,9 +17,13 @@ #include "hw/virtio/virtio.h" #include "exec/address-spaces.h" +#if defined(TARGET_PPC64) || defined(TARGET_ARM) +#define LEGACY_VIRTIO_IS_BIENDIAN 1 +#endif + static inline bool virtio_access_is_big_endian(VirtIODevice *vdev) { -#if defined(TARGET_IS_BIENDIAN) +#if defined(LEGACY_VIRTIO_IS_BIENDIAN) return virtio_is_big_endian(vdev); #elif defined(TARGET_WORDS_BIGENDIAN) if (virtio_vdev_has_feature(vdev, VIRTIO_F_VERSION_1)) { diff --git a/target-arm/cpu.h b/target-arm/cpu.h index 401955f825..17d80510da 100644 --- a/target-arm/cpu.h +++ b/target-arm/cpu.h @@ -29,8 +29,6 @@ # define TARGET_LONG_BITS 32 #endif -#define TARGET_IS_BIENDIAN 1 - #define CPUArchState struct CPUARMState #include "qemu-common.h" diff --git a/target-ppc/cpu.h b/target-ppc/cpu.h index 98a24a50f3..db7ee0c74d 100644 --- a/target-ppc/cpu.h +++ b/target-ppc/cpu.h @@ -28,8 +28,6 @@ #define TARGET_LONG_BITS 64 #define TARGET_PAGE_BITS 12 -#define TARGET_IS_BIENDIAN 1 - /* Note that the official physical address space bits is 62-M where M is implementation dependent. I've not looked up M for the set of cpus we emulate at the system level. */ |